"Kind of makes you want to have a royal child of your own, doesn't it Kermie?" Piggy asked her other half Kermit, who seemed unimpressed by the idea of the "pitter-patter of tadpole feet". "Tadpoles don't have feet," he replied.

Disney's Muppets Most Wanted, a sequel to 2011's The Muppets, will see the titular characters drawn into a European jewel heist with Ricky Gervais leading the cast. The film will open in cinemas in March 2014.